40 CFR 421.263 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

§ 421.263 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

Except as provided in40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:

2 This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of precious metals, including silver, produced in refinery

Copper

1.280

0.610

Cyanide (total)

0.200

0.080

Zinc

1.020

0.420

Combined metals

0.300

Ammonia (as N)

133.300

58.600

(f) Gold solvent extraction raffinate and wash water.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of gold produced by solvent extraction

Copper

0.806

0.384

Cyanide (total)

0.126

0.050

Zinc

0.643

0.265

Combined metals

0.189

Ammonia (as N)

83.980

36.920

(g) Gold spent electrolyte.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of gold produced by electrolysis

Copper

0.0111

0.0053

Cyanide (total)

0.0017

0.0007

Zinc

0.0089

0.0037

Combined metals

0.0030

Ammonia (as N)

1.1600

0.5100

(h) Gold precipitation and filtration.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of gold precipitated

Copper

5.632

2.684

Cyanide (total)

0.880

0.352

Zinc

4.488

1.848

Combined metals

1.320

Ammonia (as N)

586.500

257.800

(i) Platinum precipitation and filtration.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of platinum precipitated

Copper

6.656

3.172

Cyanide (total)

1.040

0.416

Zinc

5.304

2.184

Combined metals

0.560

Ammonia (as N)

693.200

304.700

(j) Palladium precipitation and filtration.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of palladium precipitated

Copper

7.680

3.660

Cyanide (total)

1.200

.480

Zinc

6.120

2.520

Combined metals

1.800

Ammonia (as N)

799.800

351.600

(k) Other platinum group metals precipitation and filtration.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of other platinum group metals precipitated

Copper

6.656

3.172

Cyanide (total)

1.040

0.416

Zinc

5.304

2.184

Combined metals

1.560

Ammonia (as N)

693.200

304.700

(l) Spent solutions from PGC salt production.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of gold contained in PGC product

Copper

1.152

0.549

Cyanide (total)

0.180

0.072

Zinc

0.918

0.378

Combined metals

0.270

Ammonia (as N)

120.000

52.740

(m) Equipment and floor wash.

BAT Limitations for the Secondary Precious Metals Subcategory

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/troy ounce of precious metals, including silver, produced in refinery